Oven-heat-regulating device



Dec. 11, 1928.

1,694,682 E. L. cLAus ET AL OVEN HEAT REGULATING DEVICE Filed Oct. 14, 1922 2 Sheets-Sheet 1 1&\\\\\\\\\\\\\\\ E Emil L E1EU5 Walter EJIlaus A @XEQ'QAW Dec. 11, 1928.

E. L. cLAus ET AL OVEN HEAT REGULATING DEVICE Filed Oct. 14. 1922 P vwewo we Emrl L Claus Walt at E. Claus Wat/21. v

@AQVOZ s sag 2 Sheets-Sheet 2 v Patented Dec. 11, 1928.

UNITED STATES PATENT OFFICE.

EMI L. CLAUS AND WALTER E. CLAUS,

DIRECT AND MESNE ASSIGNMENTS,

KEE, WISCONSIN, A CORPORATION OF WISCONSIN.

OVEN-HEAT-REGULATING DEVICE.

Application filed October 14, 1922. Serial No. 594,603.

This invention relates to certain new and useful improvements in oven h devices, and 1s a continuation,

eat regulating as to all common subject matter, of our Letters Patent Number 1,433,179, issued October 24., 1922,

and our applications filed March 18, 1921,

November 25, 1921,

invention is to provide ble of application to ovens at the time sting types of oven temperature regulating devices is the inability of the operator to readily view thetemperature setting subjecting h1s or her fac dial without steeping and e and arms to the possibility of being burned. Therefore, it

is another object an improved type of dia of our invention to provide 1 which is so constructed and arranged as to permit ready visibility without any eff the operator.

A further object of thi in the provision of a ort on the part of s invention resides device of the class described, which is so designed and constructed as to permlt its application to an oven of any type time positioning the ind to permit ready sighting.

and in any position,

at the same icatmg dial so as A further object of this invention is to provide a dial for indicating the temperature at which the device is set,

which dial has two sets of delineations thereon, one set designating degrees of temperature and another set representing the special usages for which the oven is adapted at the various degrees, and

a double pointing or indie ating means simultaneously aligning with any one of the degrees and with the corresponding delineation of the other side.

In the present types of devices of the character described, inaccurate calibration is obtained as when the device direction the play 1n the i to one side and when the in the reversed direction the p1 ing means is on the other side.

is adjusted in one ndicating means is device is adjusted ay in indicat- Therefore,

a still further object of our invention resides in the provision of between the parts of the times to one side, irrespe tion in which the device is means whereby the play indicator is at all ctive of the direcbeing adjusted.

lVith the above and other objects in view which will appear as the description proceeds,.our invention resides in the novel construction, combination and arrangement of parts substantially as hereinafter described and more particularly defined by the appended claims, it being understood that such changes in the precise embodiment of the hereindisclosed invention may be made as come within the scope of the claims.

In the accompanying drawings, we have illustrated one complete example of the physical embodiment of our invention, and several modifications thereof, constructed according to the best mode we have so far devised for the practical application ofthe principles thereof, and in which:

Figure 1 is a perspective view of an oven temperature controlling device embodying our invention;

Figure 2 is an enlarged fragmentary detail View illustrating the construction of our improved setting device, parts thereof being broken away and in section to more clearly illustrate features of construction;

Figure 3 is. a view, partly in section and partly in elevation, taken through the adjusting shaft or rod;

Figure 4 is a view, partly in section and partly in elevation, taken through Figure 2 of the line 4--4, and

Figure 5 is a view similar to Figure 4 of a slightly modified form of our invention in which the dial is adjustable about the axis of the device regulating member.

Referring now more particularly to the accompanying drawings, in which like numerals designate like parts throughout the several views, the numeral 7 designates the wall of a heating oven which is cut away or apcrtured, as at 8, to permit the insertion therethrough of the mounting for the temperature change sensitive member 9 of our improved device, as illustrated in our aforementioned co-pen'ding application filed November 25, 1921, Serial No. 517,823.

The temperature change sensitive member mounting is in the form of a baflle member 10 in which it is secured so that its medial portion bows When subjected to a temperature change to actuate a valve 11 including a valve member 11 having a valve stem 12, the valve being located in the fuel supply line 12 of the oven burners (not shown). One of the securing means for member 9 is in the form of a screw shaft or rod 13 which passes outwardly of the oven through a thread boss 14 carried by the baflie member and the other securing means for the member 9 being in the form of a detachable spool or post 13.

As in our previous applications, the device is secured in position by an outer plate 15, the end of which adjacent boss ll is provided with two laterally struck flanges 16 preferably disposed at right angles with respect to each other to facilitate the mounting of a fixed dial 17. The dial 1? is secured to one of the flanges 16 by suitable fastenings 1S and by providing two flanges, at right angles with respect to each other, the dial may be positioned at an angle of approximately fortylive degrees with respect to the perpendicular irrespective of the position of the device on the oven, thus insuring easy sighting thereof and eliminating the necessity of stooping on the part of the operator to read the dial.

The opposite ends of the dial are graduated, one end 19 having degrees delineated thereon and the other end 20 having suitable designations delineated thereon representing the condition to which the oven is best adapted at the respective degrees, an indicating hand or pointer 21 being medially pivoted on the dial, as at 22, whereby its ends 23 and 2st register with the designations l9 and 20, respectively.

As described in our aforementioned Letters Patent and applications, the device is set by moving the end of the temperature change sensitive member connected with the adj usting member 13 toward and away from the oven wall and this adjustment is transmitted to the pointer 21 by a pin 25 fixed to the pointer at a point slightly spaced from its pivot and engaging in a channel or annular groove 26, formed in the periphery of a col lar member 27 adj ustably mounted on rod 13.

As will be obvious, a movement of the adjustable member into or out of the oven results in a corresponding movement of the pointer to register the ends thereof with the proper designations and should it be desired to maintain the oven at a temperature of 100 degrees the adjusting member is rotated by means of its knob or handle 28 until pointer end 23 aligns with the designation 400, which adjustment will simultaneously register the pointer end 2 1 with the designation Biscuits, for which the oven is best suited when maintained at a temperature of 400 degrees.

The device is readily adjustable by loosening locknut 29 and changing the position of collar 27 on stem 13.

Due to the expansion incidental to heat, it is desirable that some play be allowed between pin 25 and the side walls of channel 26 and ordinarily this play results in inaccurate calibration, as a movement of stem 13 into the oven engages the pin against the outer wall of channel 26 and an adjustment of stem 13 in the opposite direction engages pin 25 with the inner wall thereof. To overcome this objectionable feature and consequently insure accurate calibration, pin 25 is at all times yieldably urged to engage but one Wall of channel 26 by a spring 30, one end of which is secured to one arm of the pointer, as at 31, and the other end of which is secured to one of the flanges 16, as at 32.

If desirable, the flanges 16 may be eliminated and the adjustment of the angularity of the dial 17 obtained by .rotatably securing a plate 33 about boss 14, which has a laterally struck flange 3-1, to which the dial is secured, the adjustment of plate 33 being maintained by a binding member carried by plate 15 passing through an arcuated slot 36 in plate 33.

\Vhat we claim as our invention is:

1. In a device of the character described, a fuel control valve, thermo-actuated means for operating the control valve, an indicating dial, an indicator pivotally connected with the dial to traversev the same and indicate the adjustment of the thermo-actuated means, and means connecting the indicator with the thermo-actuated means, said indicator being connected with the thermo-actuated means to one side of its point of pivot.

2. In a device of the character described, a valve member for supplying fuel to a burner, a thermo-actuated member for controlling the valve member, means for adjusting the thermo-actuated member for maintaining an oven to which the device is applied at a substantially predetermined degree and including a normally stationary indicating dial, a pointer pivotally mounted with respect to the dial, an adjustable member having a connection with the thermo-aetuated member and movable transversely with respect to the pivot of the pointer as the thermo-actuated member is adjusted, and a connection between said pointer and adjustable member whereby said pointer is moved to indicate ,on said dial the degree at which said thermo-actuated member is set to maintain the oven.

3. In a device of the character described, a setting dial, a support therefor, an indicating hand pivotally mounted to traverse the dial, an adjusting member having an annular channel, and a pin carried by the hand to one side of its pivot and engaging in said channel, whereby adjustment of said member moves the indicating hand to a corresponding point on the dial.

4c. In a device of the character described, a setting dial, a support therefor, an indicating hand pivotally 1. ounted to traverse the dial, an adjusting member "ving an annular channel, a pin carried by tne hand to one side of its pivot and engaging in said channel, whereby adjustment of said member moves the indicating hand to a corresponding point on the dial, and means for urging said pin to engage ment with one side of said channel.

5. In a device of the character described, a setting dial, a support therefor, an indicating hand pivotally mounted to traverse the dial, an adjusting member having an annular channel, a pin carried by the hand to one side of its pivot and engaging in said channel, whereby adjustment of said member moves the indicating hand to a corresponding point on the dial, and spring means for yieldably urging said pin to engagement with one side of said channel.

6. In a device of the character described, an adjusting post, a setting dial, means mount ing the setting dial for rotation about the axis of said post, means for securing said dial in the desired position of adjustment, an indicating hand pivotally carried by said dial, a pin carried by said indicator to one side of its pivot, and an annularly grooved collar member mounted on said post in which said indicator pin is engageable.

7. In an oven heat regulator, an indicating dial, a movable indicator cooperating with the dial, and means adj ustably mounting the dial whereby the angle of its face may be adjusted to the convenience of a person using the same, the indicator moving with the dial as it is adjusted.

In testimony whereof we affix our signaiures.

EMIL L. GLAUS. WALTER E. CLAUS. 

